I haven't had an issue with my BF's step-D since January, when she went back to the South American country that she lives in.

A couple of days ago, we found out that she was moving back to the States. She will be a couple of states away, but will still be within a day's drive of us. Maybe I'm paranoid because I've dealt with a crazy mother, a crazy XH (who I still deal with because of our shared bio kids), and crazy ILs, but I'm worried about his crazy step-D. I really just don't want to have any drama with her, but considering how she acted in January, I'm sure that there will be something.

BF feels responsible for her, because she sided with him when he and her mother divorced. Her bio dad is deceased. When she comes over, she demands a lot of his attention, moreso than his daughter. His D is 15, and step-D is 25. She is a Cornell graduate, but won't do simple things like open her own checking account without BF "helping" her. She also demands more attention than his bio-D does.

This is the one issue that we have had. I'm hoping that she stays away while she is living a couple of states away. BF knows that after the way she attacked me that I have no desire to be friends with her, and he says he understands. We'll see if he meant it. He did totally and fully take my side in our conflict. Do you guys think that I have a reason to be worried?